Fix asyncio warnings/markers. (#574)

* Fix asyncio warnings/markers.

Signed-off-by: dblock <dblock@amazon.com>

* Allow some flexibility in codecov.

Signed-off-by: dblock <dblock@amazon.com>

---------

Signed-off-by: dblock <dblock@amazon.com>

.github/codecov.yml

@@ -0,0 +1,5 @@
+coverage:
+  status:
+    project:
+      default:
+        threshold: 0.1%

test_opensearchpy/test_async/test_http_connection.py

@@ -30,15 +30,12 @@ from typing import Any
 
 import mock
 import pytest
-from _pytest.mark.structures import MarkDecorator
 from multidict import CIMultiDict
 
 from opensearchpy._async._extra_imports import aiohttp  # type: ignore
 from opensearchpy._async.compat import get_running_loop
 from opensearchpy.connection.http_async import AsyncHttpConnection
 
-pytestmark: MarkDecorator = pytest.mark.asyncio
-
 
 class TestAsyncHttpConnection:
     def test_auth_as_tuple(self) -> None:
@@ -60,6 +57,7 @@ class TestAsyncHttpConnection:
         c = AsyncHttpConnection(http_auth=auth_fn)
         assert callable(c._http_auth)
 
+    @pytest.mark.asyncio  # type: ignore
     @mock.patch("aiohttp.ClientSession.request", new_callable=mock.Mock)
     async def test_basicauth_in_request_session(self, mock_request: Any) -> None:
         async def do_request(*args: Any, **kwargs: Any) -> Any:
@@ -91,6 +89,7 @@ class TestAsyncHttpConnection:
             fingerprint=None,
         )
 
+    @pytest.mark.asyncio  # type: ignore
     @mock.patch("aiohttp.ClientSession.request", new_callable=mock.Mock)
     async def test_callable_in_request_session(self, mock_request: Any) -> None:
         def auth_fn(*args: Any, **kwargs: Any) -> Any:

test_opensearchpy/test_async/test_plugins_client.py

@@ -8,18 +8,24 @@
 # Modifications Copyright OpenSearch Contributors. See
 # GitHub history for details.
 
-from unittest import TestCase
+
+import warnings
+
+import pytest
+from _pytest.mark.structures import MarkDecorator
 
 from opensearchpy._async.client import AsyncOpenSearch
 
+pytestmark: MarkDecorator = pytest.mark.asyncio
 
-class TestPluginsClient(TestCase):
+
+class TestPluginsClient:
     async def test_plugins_client(self) -> None:
-        with self.assertWarns(Warning) as w:
+        with warnings.catch_warnings(record=True) as w:
             client = AsyncOpenSearch()
             # testing double-init here
             client.plugins.__init__(client)  # type: ignore
-            self.assertEqual(
-                str(w.warnings[0].message),
-                "Cannot load `alerting` directly to AsyncOpenSearch as it already exists. Use `AsyncOpenSearch.plugin.alerting` instead.",
+            assert (
+                str(w[0].message)
+                == "Cannot load `alerting` directly to AsyncOpenSearch as it already exists. Use `AsyncOpenSearch.plugin.alerting` instead."
             )